package com.tanhua.server.service;

import cn.hutool.core.collection.CollUtil;
import com.tanhua.autoconfig.template.OssTemplate;
import com.tanhua.dubbo.api.MovementApi;
import com.tanhua.dubbo.api.UserInfoApi;
import com.tanhua.dubbo.api.VisitorsApi;
import com.tanhua.model.domain.UserInfo;
import com.tanhua.model.mongo.Movement;
import com.tanhua.model.mongo.Visitors;
import com.tanhua.model.vo.ErrorResult;
import com.tanhua.model.vo.MovementsVo;
import com.tanhua.model.vo.PageResult;
import com.tanhua.model.vo.VisitorsVo;
import com.tanhua.server.exception.BusinessException;
import com.tanhua.server.interceptor.UserHolder;
import com.tanhua.utils.Constants;
import org.apache.commons.lang3.StringUtils;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class MovementService {
    @Autowired
    private OssTemplate ossTemplate;

    @DubboReference
    private MovementApi movementApi;

    @DubboReference
    private UserInfoApi userInfoApi;

    @DubboReference
    private VisitorsApi visitorsApi;
    @Autowired
    private RedisTemplate<String,String> redisTemplate;


    public void publishMovement(Movement movement, MultipartFile[] imageContent) throws IOException {
//        1、判断发布动态的内容是否存在
        if (StringUtils.isEmpty(movement.getTextContent())){
            throw  new BusinessException(ErrorResult.contentError());
        }
//        2、获取当前登录的用户id
        Long userId = UserHolder.getUserId();
//        3、将文件内容上传到阿里云OSS，获取请求地址
        List<String> medias = new ArrayList<>();
        for (MultipartFile multipartFile : imageContent) {
            String upload = ossTemplate.upload(multipartFile.getOriginalFilename(), multipartFile.getInputStream());
            medias.add(upload);
        }
//        4、将数据封装到Movement对象
        movement.setUserId(userId);
        movement.setMedias(medias);
//        5、调用API完成发布动态
        movementApi.publish(movement);
    }

//    查询好友动态
    public PageResult findFriendMovements(Integer page, Integer pagesize) {
//        1.获取当前用户的id
        Long userId = UserHolder.getUserId();
//        2.调用API查询当前用户好友发布的动态列表
         List<Movement> list = movementApi.findFriendMovements(page,pagesize,userId);
//        3.判断列表是否为空
        return getPageResult(page,pagesize,list);
    }

//    抽取公共方法
    private PageResult getPageResult(Integer page, Integer pagesize, List<Movement> list) {
        if(CollUtil.isEmpty(list)) {
            return new PageResult();
        }
        //4、提取动态发布人的id列表
        List<Long> userIds = CollUtil.getFieldValues(list, "userId", Long.class);
        //5、根据用户的id列表获取用户详情
        Map<Long, UserInfo> map = userInfoApi.findByIds(userIds, null);
        //6、一个Movement构造一个vo对象
        ArrayList<MovementsVo> vos = new ArrayList<>();
        for (Movement movement : list){
            UserInfo userInfo = map.get(movement.getUserId());
            if (userIds != null){
                MovementsVo vo = MovementsVo.init(userInfo, movement);
                vos.add(vo);
            }
        }
        //7、构造PageResult并返回
        return new PageResult(page,pagesize,0l,vos);
    }

//    查询推荐动态
    public PageResult findRecommendMovements(Integer page, Integer pagesize) {
        //1、从redis中获取推荐数据
        String redisKey = Constants.MOVEMENTS_RECOMMEND + UserHolder.getUserId();
        String redisValue = redisTemplate.opsForValue().get(redisKey);
        //2、判断推荐数据是否存在
        List<Movement> list = Collections.EMPTY_LIST;
        if (StringUtils.isEmpty(redisValue)) {
            //3、如果不存在，调用API随机构造10条动态数据
            list = movementApi.randomMovements(pagesize);
        } else {
            //4、如果存在，处理pid数据
            String[] values = redisValue.split(",");
            //判断当前页的起始条数是否小于数组总数
            if ((page - 1) * pagesize < values.length) {
                List<Long> pids = Arrays.stream(values).skip((page - 1) * pagesize).limit(pagesize)
                        .map(e -> Long.valueOf(e))
                        .collect(Collectors.toList());
                //5、调用API根据PID数组查询动态数据
                list = movementApi.findMovementsByPids(pids);
            }
        }
        //6、调用公共方法构造返回值
        return getPageResult(page, pagesize, list);
    }

    //根据id查询
    public MovementsVo findById(String movementId) {
        //1、调用api根据id查询动态详情
        Movement movement = movementApi.findById(movementId);
        //2、转化vo对象
        if(movement != null) {
            UserInfo userInfo = userInfoApi.findById(movement.getUserId());
            return MovementsVo.init(userInfo,movement);
        }else {
            return null;
        }
    }

//    首页-访客列表
    public List<VisitorsVo> queryVisitorsList() {
        //1、查询访问时间
        String key = Constants.FREEZE_USER;
        String hashKey = String.valueOf(UserHolder.getUserId());
        String value = (String) redisTemplate.opsForHash().get(key, hashKey);
        Long date = StringUtils.isEmpty(value) ? null: Long.valueOf(value);
        //2、调用API查询数据列表 List<Visitors>
        List<Visitors> list = visitorsApi.queryMyVisitors(date,UserHolder.getUserId());
        if(CollUtil.isEmpty(list)) {
            return new ArrayList<>();
        }
        //3、提取用户的id
        List<Long> userId = CollUtil.getFieldValues(list, "visitorsUserId", Long.class);
        //4、查看用户详情
        Map<Long, UserInfo> map = userInfoApi.findByIds(userId, null);
        //5、构造返回
        ArrayList<VisitorsVo> vos = new ArrayList<>();
        for (Visitors visitors : list){
            UserInfo userInfo = map.get(visitors.getVisitorUserId());
            if (userInfo != null){
                VisitorsVo vo = VisitorsVo.init(userInfo, visitors);
                vos.add(vo);
            }
        }
        return vos;
    }
}
